motive
用法要点
句型搭配
motive 常与 have、question、investigate 等动词搭配，用于描述或探究行为的原因。在句子中通常作宾语或主语补足语。
介词用法
motive 后常接 for 表示动机的目的或对象，如 motive for action；也可用 behind 强调隐藏的动机，如 motive behind the crime。
语域说明
motive 在正式语体（如法律、学术、商务）中常见，指理性或可分析的动机；日常对话中可替换为 reason 或 purpose，但 motive 更强调深层意图。
基础例句
What was your motive for helping that stranger?
你帮助那个陌生人的动机是什么？
She had a strong motive to finish the project on time.
她有强烈的动机要按时完成这个项目。
I don't understand his motive for quitting such a good job.
我不明白他辞去这么好工作的动机。
The police are trying to find the motive behind the robbery.
警方正在努力查明抢劫案背后的动机。
高级例句
In business ethics, analyzing the profit motive is crucial for understanding corporate decisions.
在商业伦理中，分析利润动机对于理解企业决策至关重要。
The researcher examined the primary motives driving consumer behavior in the digital age.
研究人员考察了数字时代驱动消费者行为的主要动机。
Legal cases often hinge on establishing a clear motive for the defendant's actions.
法律案件通常取决于确立被告行为的明确动机。
The company's sustainability report outlines the environmental motives behind its new policies.
公司的可持续发展报告概述了其新政策背后的环境动机。
高频搭配
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常见错误
错误在于使用了不定式 to help，而 motive 后通常接 for + 动名词或名词短语表示动机的目的，应改为 for helping。
错误在于使用了介词 of，但 motive 表示动机时常用 for 连接动作或事件，应改为 for this action 以更符合习惯用法。
近义词辨析
reason
reason 更通用，指任何行动或决定的解释或依据，可能更表面；motive 强调内在的、驱动行为的深层意图，常带情感或目的性。
Her reason for leaving early was traffic, but her motive was to avoid the meeting.
purpose
purpose 指计划或行动的目标或意图，更侧重结果导向；motive 更强调行为背后的原因或推动力，可能隐含个人或隐藏因素。
The purpose of the meeting is to discuss budgets, but his motive might be to gain influence.